The SENSORBEAM ADVANCED features a unique movement sensor. Depress the sensor on/off button to set the sensor (indicated by a blue indicator light). The SENSORBEAM ADVANCED will then illuminate when your hand passes in front of it, and turn off when your hand passes in front of it again. SPECIFICATION • BUTTON OR MOVEMENT SENSOR ILLUMINATION • CHOOSE BETWEEN: - HIGH POWER 300 LUMEN - 85m BEAM - POWER SAVING 90 LUMEN - 53m BEAM - LOW-VISIBILITY GREEN MODE • CREE-XTE LEDS • MULTI-ANGLE BEAM • WATER RESISTANT • SUPER-TOUGH ABS BODY • BUILT IN POWER METER • ADJUSTABLE ELASTICATED HEADBAND • UP TO 5 HRS BATTERY LIFE DEPENDENT ON SETTING • 3 HRS CHARGE TIME • LIGHTWEIGHT: 73G • LI-POLYMER BATTERY (3.7V/1200mAh) • INCLUDED: USB CHARGER CABLE & HARD SHELL PROTECTIVE CASE Batteries (not included)